Plastic testing machine for silicone rubber

Abstract

The utility model discloses a plasticity testing machine for silicone rubber, which relates to the technical field of plasticity testing machines and comprises a box body, a testing inner cavity is arranged in the box body, a box door is rotatably connected outside the box body, a placing table and a pressing column are arranged in the testing inner cavity, a connecting rod is arranged on the pressing column, and the connecting rod penetrates through the top of the box body to be connected with a measuring instrument. Supporting rods are arranged on the two sides of the connecting rod, and a lifting mechanism used for controlling lifting is arranged on the pressing column. A heating piece is mounted in the test inner cavity; exhaust mechanisms are arranged on the two sides of the interior of the test inner cavity, each exhaust mechanism comprises installation openings formed in the two sides of the interior of the test inner cavity, exhaust fans are installed in the installation openings, and a sensor switch electrically connected with the exhaust fans is installed on the side face, where an opening of the test inner cavity is formed, of the box body. The exhaust fan is started to form inlet and outlet airflow between the opening of the test inner cavity and the mounting port, so that hot airflow is prevented from rushing to workers after the box door is opened, the discomfort of the workers is reduced, and the risk of skin diseases is reduced.

Description

Technical Field

[0001] This utility model relates to the field of plasticity testing machine technology, and in particular to a plasticity testing machine for silicone rubber. Background Technology

[0002] Silicone rubber is a high-performance synthetic material with excellent temperature resistance, weather resistance, electrical insulation and biocompatibility. It has a wide range of applications in many industries, such as food processing, medical equipment, automobile manufacturing and aerospace. These properties of silicone rubber make it an ideal choice for manufacturing various components that need to work in harsh environments.

[0003] A plasticity testing machine is a device used to measure the deformation capacity and flowability of a material under certain conditions. For silicone rubber, this type of testing machine can be used to evaluate its behavior under different processing conditions. For example, in the pretreatment stage before mixing, extrusion or injection molding, plasticity testing can help determine the flowability of silicone rubber during processing, which is crucial for controlling the quality and performance of the final product.

[0004] Currently, when using a plasticity testing machine, the sample to be tested is placed on the platform, and then the temperature of the inner cavity of the testing machine is heated to the test temperature range by the heating system. Then, pressure is applied to the sample using a pressure block. After a certain period of time, the pressure on the sample is released, and the degree of deformation of the sample is measured by instruments. Based on the changes in the sample, its plasticity index is measured. However, there are still some defects in the operation process. For example, after the test is completed, the staff needs to open the chamber door to take the test sample out of the inner cavity of the testing machine. However, since the inner cavity was previously in a closed state, and the temperature inside the inner cavity is high while the external ambient temperature is low, the temperature difference between the inside and outside is large. This causes a stream of hot air to rush towards the staff when the chamber door is opened, causing discomfort to the staff. Especially when the operation is repeated frequently, it will aggravate the risk of skin diseases.

[0005] Therefore, it is necessary to propose a new technical solution to address the above problems. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the aforementioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a plasticity testing machine for silicone rubber, comprising a housing, wherein the housing has a test cavity with a specific opening, the housing is hinged to a door in the direction of the test cavity opening, a placement platform is provided in the test cavity, a pressure column is provided above the placement platform, a connecting rod is provided on the pressure column, the connecting rod extends to the top of the housing and is connected to a measuring instrument, support rods are provided on both sides of the connecting rod, and a lifting mechanism for controlling lifting and lowering is provided on the pressure column;

[0008] A heating element is installed inside the test cavity;

[0009] The test chamber is equipped with an exhaust mechanism on both sides. The exhaust mechanism includes an installation port on both sides of the test chamber, in which an exhaust fan is installed. The housing is equipped with a sensor switch electrically connected to the exhaust fan on one side of the test chamber opening. When the housing door is closed, the exhaust fan is in a de-energized state.

[0010] As a further embodiment of this utility model: a frame is provided at the two ends of the box corresponding to the installation port. The frame is open on the side facing the installation port and has a ventilation opening on the other side. Movable baffles in a combined state are provided at the upper and lower ends inside the frame. Movable openings are provided at the upper and lower ends of the frame. The opposite ends of the movable baffles pass through the movable openings and protrude out of the frame.

[0011] Each side of the housing is equipped with a set of two electric telescopic rods. The electric telescopic rods are installed at the upper and lower ends of the frame and are connected to two movable baffles respectively. The electric telescopic rods are also electrically connected to the sensor switch.

[0012] As a further embodiment of this utility model: a filter screen is installed inside the frame, and an external dustproof screen is installed inside the vent.

[0013] As a further embodiment of this utility model: the exhaust fan is provided with an inner dustproof net on the side facing the test cavity.

[0014] As a further embodiment of this utility model: a magnetically attracted body is provided on the side of the door away from the connection end with the box body, and a magnetically attracted body corresponding to the magnetically attracted body is provided on one side of the box body.

[0015] As a further embodiment of this utility model: the lifting mechanism includes a handle provided on one side of the housing, the handle is connected to a round rod that extends into the inner cavity of the test, the round rod is provided with two fixing blocks, the fixing blocks are connected to the support rod by a transmission chain, and the end of the round rod away from the handle is rotatably connected to the inner cavity of the test.

[0016] As a further embodiment of this utility model: the placement platform is provided with bottom blocks on both sides, and a directional rod is fixedly connected to the bottom blocks. The pressure column is provided with top blocks on both sides at the lower end, and a through hole is opened on the top block. The directional rod passes through the through hole to form a sliding connection.

[0017] Compared with existing technologies, the beneficial effects of this technical solution are as follows:

[0018] 1. When the test is completed and the staff needs to open the chamber door to take out the test sample, the sensor switch set on one side of the chamber corresponding to the door detects the opening and closing action of the chamber door, thereby sending an electrical signal to the exhaust fan, causing the exhaust fan to start and exhaust the air inside the test chamber to the outside. This creates an airflow between the opening of the test chamber and the installation port after the chamber door is opened, thus preventing hot air from the test chamber from rushing to the staff after the chamber door is opened, reducing the staff's discomfort and lowering the risk of skin diseases.

[0019] 2. When the chamber door is opened, the sensor switch sends an electrical signal to the electric telescopic rod, causing the electric telescopic rod to retract the movable baffle, so that the two movable baffles move away from each other, allowing the airflow driven by the exhaust fan to be discharged through the ventilation opening of the frame. During testing, the electric telescopic rod pushes the two movable baffles together, which can block the installation opening to avoid affecting the heating time inside the test cavity and reduce energy consumption.

[0020] The exhaust fan discharges the gas inside the test chamber to the outside. As the gas passes through the frame, a filter screen can filter out harmful substances in the gas, preventing harmful substances caused by the high temperature of the test sample from being released into the external environment and affecting the physical and mental health of the staff. At the same time, the setting of the outer dustproof net in the vent and the inner dustproof net on the inside of the exhaust fan forms an internal and external dustproof effect, preventing dust from entering the filter screen and affecting the filtration effect of the filter screen.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the unfolding structure of the box door of this utility model;

[0025] Figure 3 This is a schematic diagram of the exhaust mechanism structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the frame structure of this utility model;

[0027] The corresponding labels in the attached diagram are explained as follows:

[0028] 1. Chamber; 11. Test cavity; 12. Chamber door; 121. Magnetic object; 13. Placement platform; 131. Base block; 132. Orientation rod; 2. Pressure column; 21. Connecting rod; 22. Measuring instrument; 23. Support rod; 24. Top block; 3. Lifting mechanism; 31. Handle; 32. Round rod; 33. Fixing block; 34. Transmission chain; 4. Heating element; 5. Exhaust mechanism; 51. Exhaust fan; 52. Sensor switch; 53. Inner dustproof net; 6. Frame; 61. Ventilation opening; 62. Movable baffle; 63. Movable opening; 64. Filter screen; 65. Outer dustproof net; 7. Electric telescopic rod; 8. Magnetic object. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-4 A plasticity testing machine for silicone rubber includes a housing 1, with a test cavity 11 having a specific opening inside the housing 1. The housing 1 is hinged to a door 12 in the direction of the opening of the test cavity 11. A placement platform 13 is provided inside the test cavity 11, and a pressure column 2 is provided above the placement platform 13. A connecting rod 21 is provided on the pressure column 2. The connecting rod 21 extends through to the top of the housing 1 and is connected to a measuring instrument 22. Support rods 23 are provided on both sides of the connecting rod 21. A lifting mechanism 3 for controlling lifting and lowering is provided on the pressure column 2. The lifting mechanism 3 includes a handle 31 provided on one side of the housing 1. The handle 31 is connected to a round rod 32 that extends through the test cavity 11. Two fixing blocks 33 are provided on the round rod 32. The fixing blocks 33 are connected to the support rod 23 by a transmission chain 34. The end of the round rod 32 away from the handle 31 is rotatably connected to the test cavity 11.

[0031] The test chamber 11 is equipped with a heating element 4, and the outside of the chamber 1 is also equipped with a timer, a temperature regulator, a power switch and a timing switch.

[0032] Rotating the handle 31 drives the round rod 32 and two fixed blocks 33 to rotate. The fixed blocks 33 drive the transmission chain 34, which in turn drives the support rod 23. The support rod 23 drives the pressure column 2 to rise. The pressure column 2 pushes the measuring instrument 22 through the connecting rod 21. Then, the sample to be tested is placed on the placement platform 13. The handle 31 is released, and the pressure column 2 descends under its own weight and presses down on the sample. Then, the chamber door 12 is closed, and the heating temperature of the heating element 4 is set by the temperature regulator to make the internal temperature of the test chamber 11 reach the required test temperature. The test time is adjusted by the time regulator. After the set time is reached, the heating element 4 stops working. The chamber door 12 is opened, and the handle 31 is rotated to raise the pressure column 2. Then, the degree of deformation of the sample is measured and the reading is taken by the measuring instrument 22, thus completing the plasticity test and removing the sample.

[0033] Preferably, an exhaust mechanism 5 is provided on both sides of the test cavity 11. The exhaust mechanism 5 includes an installation port on both sides of the test cavity 11, in which an exhaust fan 51 is installed. A sensor switch 52 electrically connected to the exhaust fan 51 is installed on one side of the opening of the test cavity 11 in the housing 1. When the housing door 12 is closed, the exhaust fan 51 is in a de-energized state. The sensor switch 52 is a proximity sensor. A proximity sensor is a general term for sensors that replace contact detection methods such as limit switches and are intended to detect without contacting the object. It can detect the movement and presence information of the object and convert it into an electrical signal. Among the detection methods that convert the signal into an electrical signal, there are methods that utilize the eddy current generated in the metal body of the object by electromagnetic induction, methods that utilize the change in the electrical signal capacity caused by the proximity of the object, and methods that use a guide switch.

[0034] Specifically, when the test is completed and the staff needs to open the chamber door 12 to take out the test sample, the sensor switch 52 set on one side of the chamber body 1 corresponding to the chamber door 12 detects the opening and closing action of the chamber door 12, thereby sending an electrical signal to the exhaust fan 51, causing the exhaust fan 51 to start and exhaust the air inside the test cavity 11 to the outside. This allows airflow to be formed between the opening of the test cavity 11 and the installation port after the chamber door 12 is opened, thereby preventing hot air from flowing into the test cavity 11 after the chamber door 12 is opened and affecting the staff, reducing the staff's discomfort and lowering the risk of skin diseases.

[0035] Preferably, a frame 6 is provided at the two ends of the housing 1 corresponding to the installation port. The frame 6 is open on the side facing the installation port, and a ventilation port 61 is provided on the other side. Movable baffles 62 in a combined state are provided at the upper and lower ends inside the frame 6. Movable openings 63 are provided at the upper and lower ends of the frame 6. The opposite ends of the movable baffles 62 pass through the movable openings 63 and protrude out of the frame 6.

[0036] Two electric telescopic rods 7 are installed on both sides of the housing 1. The electric telescopic rods 7 are installed at the upper and lower ends of the frame 6 respectively and are connected to the two movable baffles 62 respectively. The electric telescopic rods 7 are electrically connected to the sensor switch 52.

[0037] Specifically, when the door 12 is opened, the sensor switch 52 sends an electrical signal to the electric telescopic rod 7, causing the electric telescopic rod 7 to retract the movable baffle 62, so that the two movable baffles 62 move away from each other, thereby allowing the airflow driven by the exhaust fan 51 to be discharged through the ventilation opening 61 of the frame. During testing, the electric telescopic rod 7 pushes the two movable baffles 62 together, which can block the installation opening to avoid affecting the heating time inside the test cavity 11 and reduce energy consumption.

[0038] Preferably, a filter screen 64 is installed inside the frame 6, and an outer dustproof screen 65 is installed inside the vent 61. The filter screen 64 may be a mesh plate filled with activated carbon particles.

[0039] Specifically, the exhaust fan 51 discharges the gas inside the test chamber 11 to the outside. During the process of the gas passing through the frame 6, the filter screen 64 can filter the harmful substances in the gas, so as to prevent the harmful substances generated by the test sample due to high temperature from being emitted into the external environment and affecting the physical and mental health of the staff. At the same time, the dustproof net 65 in the ventilation port 61 prevents dust from the outside air from entering the filter screen 64 and affecting the filtration effect of the filter screen 64.

[0040] Preferably, the exhaust fan 51 is provided with an inner dustproof net 53 on the side facing the test cavity 11.

[0041] The inner dust filter 53 installed on the inside can prevent dust in the air entering the test cavity 11 from entering the filter 64 through the installation port when airflow is formed between the opening of the test cavity 11 and the installation port after the exhaust fan 51 is started, thus forming an internal and external dustproof effect.

[0042] Preferably, a magnetically attracted body 121 is provided on the side of the door 12 away from the end connected to the box body 1, and a magnetically attracted body 8 corresponding to the magnetically attracted body 121 is provided on one side of the box body 1.

[0043] Specifically, when the door 12 is closed, the magnetic attractor 121 on the door 12 will be attracted by the magnetic attractor 8 on the box body 1, thereby activating the effect of fixing the door 12.

[0044] Preferably, the placement platform 13 has bottom blocks 131 on both sides, and a directional rod 132 is fixedly connected to the bottom blocks 131. The pressure column 2 has top blocks 24 on both sides at the lower end, and the top blocks 24 have through holes. The directional rod 132 passes through the through holes to form a sliding connection.

[0045] Specifically, when the pressure column 2 is driven to rise or fall, it slides through the through hole in the top block 24 and the directional rod 132 on the bottom block 131, thereby improving the stability of the pressure column 2 during lifting and lowering, reducing displacement during lifting and lowering, and improving the pressure effect.

[0046] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A plasticity testing machine for silicone rubber, characterized in that, The test chamber includes a housing (1), which has a test cavity (11) with a specific opening inside. The housing (1) is hinged to a door (12) in the direction of the opening of the test cavity (11). A placement platform (13) is provided inside the test cavity (11). A pressure column (2) is provided above the placement platform (13). A connecting rod (21) is provided on the pressure column (2). The connecting rod (21) extends through to the top of the housing (1) and is connected to a measuring instrument (22). Support rods (23) are provided on both sides of the connecting rod (21). A lifting mechanism (3) for controlling the lifting and lowering is provided on the pressure column (2). A heating element (4) is installed inside the test cavity (11); The test cavity (11) is provided with an exhaust mechanism (5) on both sides. The exhaust mechanism (5) includes an installation port on both sides of the test cavity (11). An exhaust fan (51) is installed in the installation port. The box (1) is provided with a sensor switch (52) electrically connected to the exhaust fan (51) on one side of the opening of the test cavity (11). When the box door (12) is closed, the exhaust fan (51) is in a power-off state.

2. The plasticity testing machine for silicone rubber according to claim 1, characterized in that, The box (1) has a frame (6) at both ends corresponding to the mounting port (14). The frame (6) is open on the side facing the mounting port (14) and has a ventilation port (61) on the other side. The frame (6) has movable baffles (62) in a combined state at the upper and lower ends inside. The frame (6) has movable openings (63) at the upper and lower ends. The opposite ends of the movable baffles (62) pass through the movable openings (63) and protrude outside the frame (6). Two electric telescopic rods (7) are installed on both sides of the box (1). The electric telescopic rods (7) are installed on the upper and lower ends of the frame (6) respectively and are connected to two movable baffles (62) respectively. The electric telescopic rods (7) are electrically connected to the sensor switch (52).

3. The plasticity testing machine for silicone rubber according to claim 2, characterized in that, The frame (6) is equipped with a filter screen (64), and the ventilation opening (61) is equipped with an external dustproof screen (65).

4. The plasticity testing machine for silicone rubber according to claim 3, characterized in that, The exhaust fan (51) is provided with an inner dustproof net (53) on the side facing the test cavity (11).

5. The plasticity testing machine for silicone rubber according to claim 1, characterized in that, The side of the door (12) away from the end connected to the box body (1) is provided with a magnetically attracted body (121), and the side of the box body (1) is provided with a magnetically attracted body (8) corresponding to the magnetically attracted body (121).

6. The plasticity testing machine for silicone rubber according to claim 1, characterized in that, The lifting mechanism (3) includes a handle (31) provided on one side of the housing (1). The handle (31) is connected to a round rod (32) that extends into the test cavity (11). Two fixing blocks (33) are provided on the round rod (32). The fixing blocks (33) are connected to the support rod (23) by a transmission chain (34). The end of the round rod (32) away from the handle (31) is rotatably connected to the test cavity (11).

7. The plasticity testing machine for silicone rubber according to claim 6, characterized in that, The placement platform (13) has a base block (131) on both sides, and a directional rod (132) is fixed on the base block (131). The pressure column (2) has a top block (24) on both sides at the lower end, and a through hole is opened on the top block (24). The directional rod (132) passes through the through hole to form a sliding connection.

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